Add capability to disable CRC stripping. This breaks IPMI/BMC capabilities on certain adatpers.
Linux has been doing the exact same thing since 2008

https://github.com/torvalds/linux/commit/eb7c3adb1ca92450870dbb0d347fc986cd5e2af4

PR: 161277
Differential Revision: https://reviews.freebsd.org/D3282
Submitted by: Fravadona@gmail.com
Reviewed by: erj wblock
MFC after: 2 weeks
Relnotes: yes
Sponsored by: Limelight Networks